Adding 100.64.0.0/10 Prefixes to the IPv4 Locally-Served DNS Zones Registry
M. Andrews
May 2016
Best Current Practice
Abstract of RFC 6303
Experience with the Domain Name System (DNS) has shown that there are
a number of DNS zones that all iterative resolvers and recursive
nameservers should automatically serve, unless configured otherwise.
RFC 4193 specifies that this should occur for D.F.IP6.ARPA. This
document extends the practice to cover the IN-ADDR.ARPA zones for RFC
1918 address space and other well-known zones with similar
characteristics. This memo documents an Internet Best Current Practice.
Abstract of RFC 7793
RFC 6598 specifies that "Reverse DNS queries for Shared Address Space
addresses [100.64.0.0/10] MUST NOT be forwarded to the global DNS
infrastructure."
This document formally directs IANA to add the associated zones to
the "IPv4 Locally-Served DNS Zones Registry" to prevent such queries
from accidentally leaking to the global DNS infrastructure.